Conveyer belt



R. EVWINCH CONVEYER BELT Aug. 1, 1939.

Filed July' 8, 1937 textile material Patented Aug. 1,

PATENT 4,ortica means I comme. naar y Reuben ErWinch, Dalian-Tex., assigner to The B. F. Goodrich Company, New York, corporation of New York' N. Y., a.

Appusaqnsmy s, isst, sensi Np. 152,496 4 claims. wi.' lss-iss) This invention relates to convey/er belts, and is especially useful where such belts are used to conveyheavy materials such as rock, coal and ore.'

5 Where heavymateriais are to be transportedV it isoften convenient yto 'support the conveyer belt upon rollers and in addition to provide supiporting guide ways under its margins over which the margins of the belt slide. 'I'he belt is driven lo by contact 'with its innersurface and it ,carries the material on its outer surface. V'I'lie sliding friction of the inner surface 'over the guides is very great, especially where the surface of the belt is made of rubber whereas the guides are 5 of metal. As driving of the belt is accomplished by pulleys contacting only with its inner surface,

great frictional resistance to the surface of the pulleys is necessary to prevent slippage.

'I'h principal object ofthe present invention 20 is to provide low frictional resistance to sliding along the guides together with high frictional resistance to pulley engagement on'the same face of the belt.

This and other objects will appear from the u following description and the accompanying drawing. l

Of the drawing:

Fig.v 1 isa perspective view of a portion of a belt constructed according to and embodying the in- .o vention in its preferred form. showing the supporting guides and one of the supporting idler` Fig. 2 is an under face. view of 'a portion of the belt. Il

tion of the invention, a reversible belt, Referring to the drawing. the numeral Il designates the 'upper reach of thejconveyer belt,

the belt being trained about suitabledrivlng W14 49- ieys with its upper reach supportedby idler rolls I'I, and its margins supported and guided by `an gie-iron guide ways I2, I8.

' Thebody Ilof the belt m be formed in any desired manner but preferably' -comprises plies of together to provide the desired n strength and pliability. A wear-resisting surface layer -II of rubber is lvuleanisedfto one face' of tacts with the material to behandled. On the'opposite 'faceof the body. a layer of vulcanized rubber It is provided. having high u frictional characteristics withrelationtothema- Fig. -3'is a cross-sectional -view of a u rubberlsedrabrie s1-"cords terial of the drivingpulleys. The rubber composition ordinarily employed for conveyer belts provides ample friction, although if desired the l friction may be cork or mineral substance in` the rubber composition. This layer extends only 5 over that portion-of theiunder side of the belt which-does not contact with the guide ways I2,

I3, and in order to reduce the friction of slidlng engagement with those guide ways, the portions of the 'belt in contact therewith are formed w with friction-reducing portions preferablyy comprising layers Il, I of material, preferably uncoated textile cords or fabric, and preferably having a thickness equal to that of the layer I6 so as to provide a levelface across the belt, and 15 to provide a substantial thickness for wear-resistance. While textile material is preferred for the layers II,IB, other materials of a fibrous nature or, otherwise,4 for example leather, may he employed to give the friction-.reducing propervg() ties'. A.

the preferredform of the invention'shown,

the friction-reducingportions I1. lI8 are integral' with the other parts of the belt and are located .along the margins of the lower face of the belt g5 l mature-separation of these portions, their inner margins are preferably beveiled or pressed down all shtiwlrin` Fig. 3; wlththe rubber of the layer It overlying the margins of these portions'an'd securely anchoring them', In the manufacture 85 'of the beit the various parts are preferably as- 'sembledand then vulcanized inta single operation so as to be homogeneousiy i Where itis desired. the umlegi'e of the belt nay be similarly formed with marginlrpqrtions 40 of friction reducing. material, as illustrated in 3, so that as wear of the rubber face occurs from rough material, th beltmay be reversed.

departing from vthe scope of the invention'.

LA flat conveyer belt comprising a plurali y of layers 'of woven `reinforcing fabric `arranged in-laminations extending 4from edge'v to edge of 60- the belt and at its side' faces, a -wearl lberj' of rubber-like material on the faceof the belt. a narrow strip of bare woven fabric ateacli margin of theeontacting face of the belt'adapted to l5 Various modifications maybe niade without 45 slide along a stationary guideway, the strips having inner margins of the fabric thereof terminating at the intermediate pulley-engaging portion of the, belt, and a pulley engaging layer of rubber-like material therebetween, the inner' `ing layer of rubber-like materialen the material-supportingl face of the belt, a narrow strip lof bare woven fabric at each margin of thel pulley contacting face of the belt adapted to slide along a stationary guideway, the strips .having inner margins of the fabric thereof terminating at the intermediate pulley-engaging portion of the fbelt, and a pulley-engaging layer of rubberlike materialtherebetween and ush -with the strips with the inner marginal portions of the strips held substantially parallel to the`face of the belt without oset, said belt being of uniform thickness throughout..

3. -A reversible flat conveyerxbelt comprising a a,1es,o1 l

, plurality of layers of woven reinforcing fabricy arranged in laminations extending from edge to edge of the belt, and a wear resisting layer on 'each face thereof adapted to contact with the pulley or with the material to be conveyed, each wear resisting layer comprising margins of bare 'fabric exposed to contact slidably with a stationary guide at each margin of the'belt, and a' layer o f rubber like material between the exposed fabric margins with lthe innermarginal portions of the strips held substantially parallel to the face of the belt without offset. said belt 'being of uniform thickness throughout.

4. A reversible at conveyer belt comprising a plurality of layers of woven reinforcing fabric arranged in laminations extending from edge to edge of the belt, and a wear-resisting layer on each face thereof adapted to contact with`the pulley or with the material to be conveyed, each wear-resisting layer comprising narrow marginal strips of bare fabric exposed to contact slidably with a stationary guide at each margin of the belt,4and a layer of rubber-like materialr between the strips, with the inner marginal portions of thevstrips held substantially parallel tothe face Aof the belt without offset, said belt being of uni-` form thickness throughout.

REUBEN E. WINCH. i 

